i think this is a good technique for bowhunting. the problem is that normally after i shoot a deer with my bow, i start to shake all over. If they do hear you, it stops them from taking the death sprint that most deer do. the buck i shot last year was on the trail of a hot doe, i grunted and stopped him in my lane and let him have it. he ran about 30 yards stopped and then saw a doe running away and headed after her. i knew i hit him solid but that made me doubt myself for a second. i found him shortly after belly up. if you can remember to do it, i think it def helps